Hair cutting and shearing machine.



- P. KOBER.

HAIR CUTTING AND SHEARING 111101111115.

APPLICATION FILED MAY 13,1910.

Patented June 6,1911.

, head of a screw other blade put in its place.

PATENT OFFICE.

FRITZ KOBER, OF SUHL, GERMANY.

HAIR CUTTING- 'AND SHEABING MACHINE.

Specification of Letters Patent. Patented 11118 6, 1911.

Application filed May 13, 1910. Serial No. 561,082.

To all whom it may concern:

Be it known that I, FRITZ KOBER, a subject of the King of Prussia,German Empire, residing at Suhl, Thiiringen, Germany, have inventedcertain new and useful Improvements in Hair Cutting and ShearingMachines, of which the following is a specification.

This invention relates to hair-cutting machines, shearing machines andthe like.

Under my invention the hair-cutting machine or shearing machine is soconstructed that it'is possible to change the shearing blade withouthaving to take the machine to pieces, that is tosay, the change can beeffected in a more simple and more convenient way than hithertopossible. This result is attained by the use of a flap which is adaptedto carry the interchangeable shearing blade, and is so hinged orattached to the body of the machine that it can be turned around. Thisflap) is held in position by the olt which passes through the body ofthe machine, and it can be released by giving the bolt a quarter of aturn. When this turn of the bolt is given and the flap released fromengagement with the head thereof, a-spring acts upon the flap and causesit to spring into the open position. When it is in that position, theshearing blade can be taken out very easily and an- The bolt only turnsthrough 90, so that its square head can be. introduced without anydifliculty into a notch or slot cut in the flap, and accessible when ithe flap is raised, and by turning the bolt, the head "thereof can beengaged with the flap. When that has been done, the; .flap is drawnagainst the body of the apparatus by giving further turns to the screwnut, and the interchangeable shearing blade is thereby brought intoposition against the upper knife. To facilitate this, and render itpossible for the interchangeable blade to lie close against the upperknife and make a faultless cut, the formeris held or attached at i'MO ormore points lying in a straight line and not by three points forming arigid triangle.

In order that my invention may be clearly understood, a hair-cuttingmachine, made in accordance with my invention, is shown in the drawing,by way of-example.

Figure 1 is a side View of the machine. Fig. 2 is a plan view of thesame showing the flap d in open position. Fig. 3 is a front I means of aspring which is wound around its axis of rotation. (In Fig. 1 the openposition is shown in dotted lines.)

The flap d has a long four-sided opening 6 cut in its under side, andinto this opening, the head of the screw bolt g, (which passes throughthe body of the apparatus 6) can enter. The head of the bolt 9 is madeof suitable form for this purpose, and, by turning it, it can be made toengage in the opening. The screw bolt 9 is provided with projection hand can make only one quarter of a turn, its movement being limited byits projection h which works in the recess formed in the body I). On thescrew bolt there is a nut z, knurled on the, edge, and between this nutand the body 6 an arched fiat spring k is provided. The interchangeableshearing blade 0 is secured on two pins Z provided on the flap d, and itis held fast thereon by means of a small turn bolt m.

The points of attachment of the shearing blade 0 taken altogether do notform any rigid system, as theywould do in a triangular hearing, but theylie in a straight line, and so it is possible for the under shearingblade 0 to turn about an axis drawn through these points of attachment,and, conselquently, to lie close against the upper cutt1ng blade.

When it is desired to change the blade 0, i

the nut '21 is turned to the left z'. e. the dl? rection for unscrewingthe nut from the" bolt. During this rotation the nut i will come againstthe pin a which passes transversely through'the screwbolt 9. On furtherrotating the nut i, the nut will press tifghtly against the pin a and inconsequence o the friction set up through this turning, the bolt 9 willitself be rotated and consequently" its head f will come into its otherend position parallel to the opening am the flap d. The flap is therebyreleased and under the action of its spring, opens as shown in dottedlines at Fig. 1. In this position the shearing blade can be easily takenout and another put in its place. When this has been effected the flap dis raised up again, and the nut which still bears against the pin n isturned around to the right i. e. in the direction in which the nut isscrewed on to the bolt. At the beginning of this turning the bolt head fin consequence of the friction between the nut i and the pin n makes aquarter of a turn and engages in the opening 6 of the flap d. All thatis now required is to turn the nut 11 further around thereby compressingthe spring la so that the two cutting blades will press against eachother. The apparatus is now ready for use.

Having now fully described my inven- The combination in a hair-cuttingor the body, a cutting blade removably and ad-4 justably secured to thehinged flap, a slot in the flap, a screw bolt (g) having a head en--gaging 1n the slot and retainin the flap in the closed position and anut 11) and stop pin (n) on the bolt whereby movement of the nut in theone direction presses the cutting blades together while movement in ,theother direction partially rotates the bolt and releases the flap.

In testimony whereof I aflix my signature in presence of two witnesses.

. FRITZ KOBER. Witnesses:

0. 11mm, Cum WAGNER.

